Changing an air vent filter is a straightforward process that helps maintain indoor air quality and HVAC system efficiency. It typically involves accessing the filter located behind a grille on a wall or ceiling, replacing the old filter with a new one, and securing the grille.
Understanding Air Vent Filters
Air vent filters, often called return air filters, are crucial components of your heating and cooling system. They capture dust, pollen, pet dander, and other airborne particles before the air is circulated back through your HVAC system.
Steps for Changing an Air Vent Filter
Replacing your air filter regularly is a simple maintenance task. Here’s how to do it:
1. Locate the Filter Vent
Air return vents are typically larger than supply vents and are often found on walls or ceilings. Your home may have one central return vent or several smaller ones.
2. Determine Filter Size and Type
Before you start, check the size printed on the side of your old filter. Filters come in various sizes (e.g., 20x20x1 inch, 16x25x1 inch) and Minimum Efficiency Reporting Value (MERV) ratings, which indicate how effectively they capture particles. Choose a replacement filter that matches the size and meets your desired filtration level (higher MERV = better filtration, but check your HVAC system's compatibility).
3. Open the Vent Grille
Most return air grilles are held in place by latches or screws.
- Latches: Look for small metal clips on the sides of the grille. You can usually unlatch these by hand.
- Screws: Some grilles are secured with screws, often Phillips head. Use a screwdriver to carefully remove them. Be ready to support the grille as the last screw is removed.
4. Remove the Old Filter
Once the grille is open or removed, the old filter will be visible. Carefully pull it out. Note the direction of the airflow arrow on the filter frame before removing it. This arrow indicates which way the air is flowing (towards the air handler/furnace).
5. Install the New Filter
Slide the new filter into the slot. Crucially, ensure the airflow arrow on the new filter points in the same direction as the old one and towards the air handler. Incorrect installation can hinder airflow and strain your system.
6. Close and Secure the Grille
After the new filter is in place, close the vent grille. As shown in the video reference, "Once done close the grille. And put the clips in the closed. Position you're now finished." If it uses latches, ensure they are fully engaged. If it uses screws, carefully re-install them. "You can give a slight tug" on the grille to ensure it's secure, "But be careful" not to damage the grille or wall.
7. Dispose of the Old Filter
Properly dispose of the old, dirty filter.
When to Change Your Air Filter
The frequency of changing your filter depends on several factors, including:
- The type of filter (thicker filters last longer).
- Household factors (pets, allergies, smoking).
- HVAC system usage.
A general guideline is to check and replace 1-inch filters every 30-90 days, while thicker filters (4 inches or more) might last 6-12 months.
Quick Reference Table
| Task | Description | Key Point |
|---|---|---|
| Locate | Find the return air vent(s). | Often larger, on walls or ceilings. |
| Identify Filter | Note size and type (MERV) of the old filter. | Size is printed on the frame. |
| Open Grille | Release latches or unscrew the grille. | Be prepared to support the grille. |
| Replace Filter | Remove old, insert new. | Crucially, align airflow arrow correctly. |
| Secure Grille | Close and fasten latches or screws. | "Put the clips in the closed position." |
| Final Check | Ensure grille is firmly in place. | "Give a slight tug. But be careful." |
| Dispose | Properly discard the used filter. | Simple waste disposal. |
By following these steps, including correctly closing the grille and securing the clips as demonstrated, you can easily change your air vent filters and maintain a healthier indoor environment.
